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The variance of 20 observations is 5. If each observation is multiplied by 2 then the new variance of the resulting observations, is
  • a)
    5
  • b)
    10
  • c)
    20
  • d)
    40
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
The variance of 20 observations is 5. If each observation is multiplie...

New, observations are,
2x1 , 2x2 , 2x3 , ......, 2x20
Theirmean,

Now, variance,
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The variance of 20 observations is 5. If each observation is multiplied by 2 then the new variance of the resulting observations, isa)5b)10c)20d)40Correct answer is option 'C'. Can you explain this answer?
Question Description
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